santorum said he's being out spent 10 to 1 by romney. polls show romney ahead of santorum by an average of 6 points there. but santorum is hoping conservative voters will give him the edge as they did on tuesday in mississippi and alabama. >> an analysis of the republic can primaries looks at how much they've spent on advertising. mitt romney has spent $91,000 per delegate. rick santorum about $29,000. newt gingrich, the total is $77,000. and ron paul is getting the least bang for his buck. $129,000 per delegate. >> san francisco has found a way to open parking spots but there's a price. >> and how raising taxes can lead to less money. we'll do the math on the governor's proposal. >>> san francisco is on the cutting edge when comes to helping people find a parking space. sf park changes the hourly rate from 25 cents all the way up to $6 an hour depending on demand. now that sf park has been in operation for more than a year, is it working? >> reporter: they've become a familiar site at a quarter of the 28,000 parking spots. these meters